66 lines
1.9 KiB
Groff
66 lines
1.9 KiB
Groff
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SIGSET(3) Minix Programmer's Manual SIGSET(3)
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NAME
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sigset, sigaddset, sigdelset, sigemptyset, sigfillset, sigismember -
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manipulate signal sets
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SYNOPSIS
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#include <signal.h>
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int sigaddset(sigset_t *set, int sig)
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int sigdelset(sigset_t *set, int sig)
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int sigemptyset(sigset_t *set)
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int sigfillset(sigset_t *set)
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int sigismember(const sigset_t *set, int sig)
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DESCRIPTION
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The system calls that handle signals, such as sigaction(2) and
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sigprocmask(2) use sets of signals to keep a process from being
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interrupted by those signals while executing a signal handler or a
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critical code segment. These signal sets are manipulated by the
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following functions:
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int sigaddset(sigset_t *set, int sig)
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Add signal sig to the signal set referenced by set.
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int sigdelset(sigset_t *set, int sig)
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Remove signal sig from the signal set referenced by set.
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int sigemptyset(sigset_t *set)
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Initialize the signal set referenced by set to an empty set.
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int sigfillset(sigset_t *set)
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Initialize the signal set referenced by set to an full set, i.e. all
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signals are in the set.
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int sigismember(const sigset_t *set, int sig)
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Return 1 if the signal sig is present in the set referenced by set,
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0 otherwise.
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SEE ALSO
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sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2).
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DIAGNOSTICS
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All functions except sigismember return 0 on success. Sigismember
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returns 0 or 1 on success. They return -1 with error code EINVAL for an
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invalid signal number. (They do not use EFAULT for a bad set address,
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but will simply cause a segmentation violation.)
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AUTHOR
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Kees J. Bot (kjb@cs.vu.nl)
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1
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